AIR VALVE

551 652 39 VALVE, AIR Operating within the rig's pneumatic circuit, this valve directs high-pressure air to a specific function, most commonly for flushing rock cuttings from the borehole. Its correct operation is essential for maintaining a high rate of penetration. By precisely managing airflow, it allows the drifter to work efficiently without wasting expensive compressed air, a significant operational cost in any underground mine.

A failure in this AIR VALVE can lead to several drilling problems. If the valve sticks closed or becomes clogged, flushing air will be insufficient, causing the drill bit to jam and potentially damaging the drill string. Conversely, a valve that leaks or sticks open leads to a constant loss of air pressure, reducing the overall performance of the rig and placing extra load on the compressor.

Common signs of a worn AIR VALVE include a noticeable hissing sound from leaks or a weak, inconsistent flow of flushing air at the front of the drifter. When replacing the valve, always ensure the pneumatic system is fully depressurized. It's also good practice to inspect the connecting air lines for moisture or debris, as contamination is a primary cause of premature valve failure.